Logistic distribution expected value.
APACHE-2.0 License
Logistic distribution expected value.
The expected value for a logistic random variable with location μ
and scale s > 0
is
\mathbb{E}\left[ X \right] = \mu
npm install @stdlib/stats-base-dists-logistic-mean
Alternatively,
script
tag without installation and bundlers, use the ES Module available on the esm
branch (see README).deno
branch (see README for usage intructions).umd
branch (see README).The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
var mean = require( '@stdlib/stats-base-dists-logistic-mean' );
Returns the expected value for a logistic distribution with location parameter mu
and scale parameter s
.
var y = mean( 2.0, 1.0 );
// returns 2.0
y = mean( 0.0, 1.0 );
// returns 0.0
y = mean( -1.0, 4.0 );
// returns -1.0
If provided NaN
as any argument, the function returns NaN
.
var y = mean( NaN, 1.0 );
// returns NaN
y = mean( 0.0, NaN );
// returns NaN
If provided s <= 0
, the function returns NaN
.
var y = mean( 0.0, 0.0 );
// returns NaN
y = mean( 0.0, -1.0 );
// returns NaN
var randu = require( '@stdlib/random-base-randu' );
var mean = require( '@stdlib/stats-base-dists-logistic-mean' );
var mu;
var s;
var y;
var i;
for ( i = 0; i < 10; i++ ) {
mu = ( randu()*10.0 ) - 5.0;
s = randu() * 20.0;
y = mean( mu, s );
console.log( 'µ: %d, s: %d, E(X;µ,s): %d', mu.toFixed( 4 ), s.toFixed( 4 ), y.toFixed( 4 ) );
}
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